/*#include<stdio.h>
int main()
{
	char c;
	scanf("%c", &c);
	printf("%hhd", c);
	return 0;
}*/

/*#include<stdio.h>
int main()
{
	int ret = printf("Hello world!");
	printf("\n%d", ret);
	return 0;
}*/

#include<stdio.h>
int main(){
	printf("\n%d", printf("hello world!"));
	return 0;
}
